Weather alerts in Carbon County, Wyoming, 2015

141 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Carbon County and its neighbors

Each county as a circle sized by its count in 2015. Tap one for its archive.

Alerts: 141
Warnings: 47
Watches: 35
Advisories: 29
Busiest month: December27 alerts
Busiest day: June 15, 20157 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

1 of 1 tornado warnings covering Carbon County in 2015 had a tornado report inside them; 1 of 2 tornado reports fell inside a warning, on average 6 minutes after it went out.

Carbon County, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	1	0%	2	50%	6 min
Severe thunderstorm warnings	3	1	67%	3	33%	32 min
Flash flood warnings	0			0

Each office's whole area, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Cheyenne, WY: tornado warnings	10	4	60%	17	47%	18 min
NWS Cheyenne, WY: severe thunderstorm warnings	184	85	54%	207	83%	20 min
NWS Cheyenne, WY: flash flood warnings	22	11	50%	29	93%	95 min

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

The alerts

Every alert, in the order issued. Times are local, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 3, 1:29 AM MST	Winter Storm Warning	CYS	3 days
Jan 3, 3:13 PM MST	High Wind Warning	CYS	58 hr
Jan 4, 1:15 AM MST	High Wind Watch	CYS	24 hr
Jan 7, 3:13 AM MST	High Wind Watch	CYS	10 hr
Jan 7, 1:10 PM MST	High Wind Warning	CYS	16 hr
Jan 15, 3:13 AM MST	High Wind Watch	CYS	24 hr
Jan 15, 1:58 PM MST	High Wind Warning	CYS	40 hr
Jan 17, 5:49 AM MST	High Wind Watch	CYS	4 hr
Jan 17, 9:34 AM MST	High Wind Warning	CYS	31 hr
Jan 26, 1:41 AM MST	High Wind Watch	CYS	24 hr
Jan 26, 1:28 PM MST	High Wind Warning	CYS	38 hr
Feb 1, 4:22 AM MST	High Wind Watch	CYS	22 hr
Feb 1, 2:22 PM MST	High Wind Warning	CYS	44 hr
Feb 2, 2:55 PM MST	Winter Weather Advisory	CYS	6 hr
Feb 2, 8:31 PM MST	Winter Storm Warning	CYS	41 hr
Feb 3, 2:56 AM MST	Winter Weather Advisory	CYS	35 hr
Feb 5, 2:02 PM MST	High Wind Warning	CYS	54 hr
Feb 6, 2:19 AM MST	High Wind Watch	CYS	24 hr
Feb 8, 2:24 PM MST	High Wind Watch	CYS	29 hr
Feb 13, 1:36 PM MST	Winter Storm Watch	CYS	24 hr
Feb 14, 1:51 PM MST	Winter Storm Warning	CYS	37 hr
Feb 14, 1:51 PM MST	Winter Weather Advisory	CYS	37 hr
Feb 18, 2:46 PM MST	High Wind Warning	CYS	18 hr
Feb 19, 2:45 PM MST	Winter Storm Watch	CYS	11 hr
Feb 20, 1:52 AM MST	Winter Storm Warning	CYS	50 hr
Feb 20, 1:47 PM MST	Winter Weather Advisory	CYS	38 hr
Feb 25, 2:34 AM MST	Winter Weather Advisory	CYS	18 hr
Mar 1, 2:53 AM MST	Winter Storm Watch	CYS	12 hr
Mar 1, 2:31 PM MST	Winter Storm Watch	CYS	13 hr
Mar 1, 2:31 PM MST	Winter Storm Warning	CYS	54 hr
Mar 2, 3:40 AM MST	Winter Weather Advisory	CYS	41 hr
Mar 3, 9:10 PM MST	Wind Chill Advisory	CYS	11 hr
Mar 23, 2:43 AM MDT	High Wind Watch	CYS	24 hr
Mar 23, 11:24 AM MDT	High Wind Warning	CYS	25 hr
Mar 28, 5:46 PM MDT	High Wind Warning	CYS	5 hr
Apr 2, 3:23 AM MDT	Winter Weather Advisory	CYS	24 hr
Apr 14, 3:08 AM MDT	High Wind Warning	CYS	25 hr
Apr 15, 3:21 AM MDT	Winter Weather Advisory	CYS	24 hr
Apr 15, 7:32 PM MDT	Winter Storm Watch	CYS	8 hr
Apr 16, 3:41 AM MDT	Winter Storm Warning	CYS	67 hr
Apr 16, 3:41 AM MDT	Winter Weather Advisory	CYS	67 hr
Apr 26, 2:10 AM MDT	Winter Weather Advisory	CYS	25 hr
May 3, 4:59 PM MDT	Special Weather Statement	CYS	31 min
May 3, 5:35 PM MDT	Special Weather Statement	CYS	40 min
May 4, 9:38 PM MDT	Dense Fog Advisory	CYS	20 hr
May 7, 4:01 AM MDT	Winter Storm Watch	CYS	48 hr
May 8, 10:16 PM MDT	Winter Storm Warning	CYS	40 hr
May 9, 4:06 AM MDT	Winter Weather Advisory	CYS	30 hr
May 20, 7:46 AM MDT	Dense Fog Advisory	CYS	7 hr
May 23, 12:01 PM MDT	Special Weather Statement	CYS	44 min
May 23, 12:36 PM MDT	Special Weather Statement	CYS	39 min
May 23, 2:02 PM MDT	Flash Flood Watch	CYS	28 hr
May 27, 6:16 PM MDT	Special Weather Statement	CYS	59 min
Jun 1, 5:48 PM MDT	Special Weather Statement	CYS	57 min
Jun 1, 6:56 PM MDT	Special Weather Statement	CYS	64 min
Jun 5, 9:43 AM MDT	Flash Flood Watch	CYS	14 hr
Jun 5, 1:26 PM MDT	Special Weather Statement	CYS	34 min
Jun 15, 12:41 PM MDT	Mesoscale Discussion	SPC	94 min
Jun 15, 1:43 PM MDT	Special Weather Statement	CYS	47 min
Jun 15, 2:24 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 15, 2:26 PM MDT	Special Weather Statement	CYS	49 min
Jun 15, 2:46 PM MDT	Severe Thunderstorm Warning	CYS	33 min
Jun 15, 4:02 PM MDT	Tornado Warning Tornado observed	CYS	28 min
Jun 15, 4:22 PM MDT	Mesoscale Discussion	SPC	83 min
Jun 15, 7:29 PM MDT	Mesoscale Discussion	SPC	91 min
Jun 16, 2:02 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Jun 16, 4:53 PM MDT	Mesoscale Discussion	SPC	97 min
Jun 17, 6:59 PM MDT	Special Weather Statement	CYS	46 min
Jun 30, 4:31 PM MDT	Mesoscale Discussion	SPC	119 min
Jul 1, 2:43 PM MDT	Mesoscale Discussion	SPC	3 hr
Jul 1, 5:00 PM MDT	Special Weather Statement	CYS	45 min
Jul 7, 3:16 AM MDT	Flash Flood Watch	CYS	16 hr
Jul 15, 2:56 PM MDT	Mesoscale Discussion	SPC	64 min
Jul 15, 4:20 PM MDT	Special Weather Statement	CYS	40 min
Jul 15, 5:03 PM MDT	Severe Thunderstorm Warning	CYS	57 min
Jul 15, 5:53 PM MDT	Severe Thunderstorm Warning	CYS	52 min
Jul 17, 3:45 PM MDT	Mesoscale Discussion	SPC	60 min
Jul 27, 3:57 PM MDT	Special Weather Statement	CYS	48 min
Aug 16, 4:14 PM MDT	Special Weather Statement	CYS	46 min
Aug 30, 2:53 PM MDT	Special Weather Statement	CYS	52 min
Sep 4, 9:34 PM MDT	Special Weather Statement	CYS	56 min
Sep 5, 7:04 PM MDT	Special Weather Statement	CYS	56 min
Sep 5, 8:10 PM MDT	Special Weather Statement	CYS	65 min
Sep 28, 8:56 PM MDT	Special Weather Statement	CYS	34 min
Sep 28, 9:15 PM MDT	Special Weather Statement	CYS	30 min
Sep 28, 9:39 PM MDT	Special Weather Statement	CYS	21 min
Oct 10, 2:30 AM MDT	High Wind Watch	CYS	18 hr
Oct 10, 8:24 PM MDT	High Wind Warning	CYS	23 hr
Oct 15, 2:06 PM MDT	Frost Advisory	CYS	11 hr
Oct 15, 2:06 PM MDT	Freeze Warning	CYS	19 hr
Oct 31, 1:44 PM MDT	High Wind Warning	CYS	26 hr
Nov 2, 2:14 AM MST	High Wind Watch	CYS	11 hr
Nov 2, 1:16 PM MST	High Wind Warning	CYS	12 hr
Nov 3, 1:26 AM MST	High Wind Warning	CYS	16 hr
Nov 4, 2:26 AM MST	Winter Weather Advisory	CYS	30 hr
Nov 9, 2:26 PM MST	Winter Storm Watch	CYS	23 hr
Nov 10, 1:42 PM MST	Winter Storm Warning	CYS	36 hr
Nov 10, 1:42 PM MST	Winter Weather Advisory	CYS	18 hr
Nov 12, 1:58 AM MST	Winter Weather Advisory	CYS	7 hr
Nov 12, 11:47 AM MST	High Wind Warning	CYS	20 hr
Nov 15, 4:06 PM MST	Winter Weather Advisory	CYS	41 hr
Nov 16, 4:54 AM MST	Winter Storm Warning	CYS	32 hr
Nov 17, 9:35 AM MST	High Wind Watch	CYS	18 hr
Nov 17, 9:35 AM MST	High Wind Warning	CYS	31 hr
Nov 18, 3:44 PM MST	High Wind Watch	CYS	11 hr
Nov 19, 2:41 AM MST	High Wind Warning	CYS	25 hr
Nov 19, 2:43 AM MST	Winter Weather Advisory	CYS	12 hr
Nov 19, 2:37 PM MST	Winter Storm Warning	CYS	30 hr
Nov 19, 2:37 PM MST	Winter Weather Advisory	CYS	30 hr
Nov 24, 2:16 PM MST	Winter Storm Watch	CYS	10 hr
Nov 24, 2:16 PM MST	Winter Weather Advisory	CYS	10 hr
Nov 25, 12:39 AM MST	Winter Storm Warning	CYS	34 hr
Nov 25, 12:39 AM MST	Winter Weather Advisory	CYS	40 hr
Nov 30, 11:51 AM MST	High Wind Warning	CYS	24 hr
Dec 6, 12:37 AM MST	High Wind Watch	CYS	37 hr
Dec 6, 1:18 PM MST	High Wind Warning	CYS	4 days
Dec 8, 3:16 PM MST	High Wind Watch	CYS	11 hr
Dec 10, 9:02 AM MST	High Wind Warning	CYS	14 hr
Dec 10, 12:29 PM MST	Winter Storm Watch	CYS	16 hr
Dec 10, 12:29 PM MST	Winter Storm Warning	CYS	49 hr
Dec 11, 4:08 AM MST	Winter Weather Advisory	CYS	42 hr
Dec 13, 12:44 PM MST	Winter Storm Watch	CYS	25 hr
Dec 14, 4:51 AM MST	Winter Storm Warning	CYS	46 hr
Dec 14, 4:51 AM MST	Winter Weather Advisory	CYS	42 hr
Dec 16, 3:09 AM MST	Winter Weather Advisory	CYS	29 hr
Dec 16, 2:45 PM MST	High Wind Watch	CYS	12 hr
Dec 17, 2:22 AM MST	High Wind Warning	CYS	40 hr
Dec 17, 3:32 PM MST	Blizzard Warning	CYS	19 hr
Dec 19, 2:18 PM MST	High Wind Watch	CYS	11 hr
Dec 20, 1:19 AM MST	High Wind Warning	CYS	59 hr
Dec 20, 3:25 AM MST	Winter Storm Watch	CYS	25 hr
Dec 21, 3:51 AM MST	High Wind Watch	CYS	17 hr
Dec 21, 4:10 AM MST	Winter Storm Warning	CYS	60 hr
Dec 21, 4:10 AM MST	Winter Weather Advisory	CYS	39 hr
Dec 23, 3:12 AM MST	High Wind Watch	CYS	9 hr
Dec 23, 12:33 PM MST	High Wind Warning	CYS	13 hr
Dec 23, 4:49 PM MST	Winter Weather Advisory	CYS	3 hr
Dec 23, 7:55 PM MST	Blizzard Warning	CYS	8 hr
Dec 24, 1:17 PM MST	Winter Weather Advisory	CYS	43 hr
Dec 26, 9:29 PM MST	Wind Chill Warning	CYS	10 hr
Dec 27, 5:47 PM MST	Wind Chill Warning	CYS	13 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

Product	Alerts
Severe storms
Severe Thunderstorm Warning	3
Tornado Warning	1
Severe Thunderstorm Watch	2
Mesoscale Discussion	8
Special Weather Statement	22
Flooding
Flash Flood Watch	3
Winter
Blizzard Warning	2
Winter Storm Warning	14
Winter Storm Watch	11
Winter Weather Advisory	25
Cold
Freeze Warning	1
Wind Chill Warning	2
Frost Advisory	1
Wind Chill Advisory	1
Wind and dust
High Wind Warning	24
High Wind Watch	19
Fog and smoke
Dense Fog Advisory	2

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2014 2016

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.